Key signature -. The flats and sharps at the beginning of each staff line indicating the key of music the piece is to be played. Klangfarbenmelodie -. The technique of altering the tone color of a single note or musical line by changing from one instrument to another in the middle of a note or line.
There are many diagnoses that do not have definitive tests used to determine them, or which can't be truly diagnosed until a patient has died (upon autopsy). In these cases, doctors must use combinations of symptoms, often vague symptoms, which can lead to a lack of diagnosis. The real medical problem may be highly unusual or not appropriate to the age of the patient. The doctor might not consider a diagnosis that is very rare, or very rare for that age of the patient.
The classic symptoms of coeliac disease include pale, loose, and greasy stool (steatorrhoea) and weight loss or failure to gain weight (in young children). More commonly symptoms are subtle or primarily occur in organs other than the bowel itself. It is also possible to have coeliac disease without any symptoms whatsoever. This represents at least in 43% of the cases in children. Many adults with subtle disease only have fatigue or anaemia.